CN109576477A - Heat treatment method for flow harden sections abros oil well pipe - Google Patents
Heat treatment method for flow harden sections abros oil well pipe Download PDFInfo
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- CN109576477A CN109576477A CN201811422214.2A CN201811422214A CN109576477A CN 109576477 A CN109576477 A CN 109576477A CN 201811422214 A CN201811422214 A CN 201811422214A CN 109576477 A CN109576477 A CN 109576477A
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- oil well
- well pipe
- abros
- heating
- furnace
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
Abstract
Heat treatment method for flow harden sections abros oil well pipe, comprising: I. uses the Equipments for Heating Processing such as cell-type heat-treatment furnace or Continuous Roller bottom furnace；II. using heat mediums such as resistance heating or natural gases；III. it uses with stove heating or arrives the heating methods such as temperature heating；IV. in 400-850 DEG C of temperature range, by the iron abros oil well pipe of flow harden state with after stove heating to set temperature carry out 1.5-6.0min/mm heat preservation or first by heat-treatment furnace be warming up to after set temperature again by the iron abros oil well pipe of flow harden state be placed in furnace and after furnace temperature stablize after set temperature carry out 1.5-6.0min/mm heat preservation；V. it is cooled down using furnace cooling, asbestos by backpack cover or husky lid slow cooling mode.The present invention can significantly improve flow harden sections abros oil well pipe in H2Stress-corrosion-cracking resistance in S media environment.
Description
Technical field
The invention belongs to metal material fields, and in particular to the Field of Heat-treatment of corrosion resistant alloy.
Background technique
Oil and natural gas is important non-renewable energy, the performer key player in national economy.With high-quality resource
It constantly reduces, H is more and more contained in world wide2S medium acid oil gas resource needs to exploit.The well depth highest of these projects
Up to 6000 meters or more, downhole temperature is close to 200 °C, H2S and CO2Partial pressure is high, H2S content highest is also possible to simultaneously close to 80%
Cl containing high concentration-.As well depth increases, pressure increases, temperature increases, in addition CO2、H2S、Cl-Equal corrosive medias content
Increase, mining environment is more and more harsher, and ordinary carbon steel or stainless steel oil well pipe are due to that cannot bear the corrosion of medium and in pole
Corrosion failure just occurs in short service phase, needs to select the higher high-corrosion-resisting, high strength alloy material of useful alloy constituent content
Material.Opposite martensite and two phase stainless steel, iron abros have corrosion resisting property advantage outstanding, can resist harsh environment
Corrosiveness；With respect to nickel-base alloy, the noble element content in iron abros is low and preparation process requires relative loose,
With significant cost advantage.The environment of sulfur-containing oil-gas engineering fitting all in iron abros greatly in world wide at present
With range, it is in great demand.
Since mechanical property is relatively low, the iron abros oil well pipe of single austenite structure is unable to satisfy underground
The environmental requirement of operation.It is cold worked for this purpose, generally requiring, its intensity rank is improved by strain hardening, is reached
To technical standard and design specification requirement.But the H in acid oil gas environment2The high stress shape of the corrosive medias such as S and tubing
State synergistic effect easily leads to stress corrosion cracking failure with significant stress corrosion inclination, causes huge economic damage
It becomes estranged security risk.Among these, the high-stress state source of oil well pipe includes gravitational effect, the dog-leg severity shape of going into the well that well depth is formed
At the internal stress effect etc. that is formed of curvature effect and tubing flow harden.Wherein the above two belong to Project design factor, and manage
The internal stress effect that material flow harden is formed then belongs to material oneself factor.It can be seen that conjunction Ni-based for flow harden sections
For gold, mechanical property and anticorrosion stress-resistant cracking performance are conflicts.
Due to the presence of residual stress, stress corrosion cracking easily occurs for the metal or alloy of cold plastic deformation；Due to storage
The metal or alloy system free energy of the presence of energy, cold plastic deformation increases, and is thermodynamically in metastable state, has to change
The trend of stable state conversion before shape.But at normal temperature, since dynamic conditions limits, the metal or alloy of cold plastic deformation
Metastable state can maintain for quite a long time without significant change.If temperature increases, it is provided with suitable dynamics item
The metal or alloy of part, cold plastic deformation can be changed from metastable state to stable state, and cause a series of sub- knot
Structure and performance change.By being heat-treated in specific temperature, flow harden state iron abros can be made to generate certain substructures
Variation with physical property does not significantly change its macromechanics without making its optical microstructure change yet
Energy.The resistivity of metal and alloy and point defect concentration therein are closely related, and distortion of lattice caused by point defect can make electronics
It scatters, to improve resistivity.By above-mentioned heat treatment, by cold plastic deformation in flow harden state iron abros
Caused high concentration spot defect is greatly decreased, and resistivity can be made to be remarkably decreased.In addition, since vacancy concentration reduces, alloy density
Also it can increase.In other words, wherein point defect concentration can also be verified by the decline of resistance alloys rate and the raising of density
It reduces.Point defect concentration, which reduces, means that the lower equilbrium position of energy has been arrived in the high-energy atomic migration for deviateing equilbrium position,
The residual stress of material is eliminated or significantly reduces, and the stress corrosion dehiscence resistant of the metal or alloy of cold plastic deformation is inclined to phase
It is eliminated or significantly reduces with answering.
Summary of the invention
In order to overcome the above-mentioned deficiency of existing flow harden sections abros oil well pipe, its anticorrosion stress-resistant is improved
Cracking performance, this application provides the heat treatment methods for flow harden sections abros oil well pipe.
In the following description, including certain concrete details are intended to provide comprehensively each disclosed embodiment and go deep into
Understanding.However, related fields the skilled artisan will recognize that, even if not using one or more of these concrete details and adopting
In the case where with other methods, component, material etc., embodiment can be still realized.
Technical solution of the present invention:
(1) use cell-type heat-treatment furnace or Continuous Roller bottom furnace for Equipment for Heating Processing；
(2) use resistance heating or natural gas for heat medium；
(3) using with stove heating or the heating method heated to temperature；
(4) heating temperature is 400-850 DEG C and according to the soaking time of 1.5-6.0min/mm caliber thickness；
(5) slow cooling is to room temperature.
Above-mentioned slow cooling mode is furnace cooling, asbestos by backpack cover or husky lid.
Soaking time in the present invention is every millimeter of 1.5-6.0min of thickness by caliber；
It is described to refer to the iron abros oil well pipe by flow harden state with stove heating to 400-850 DEG C with stove heating；
It is described refer to temperature heating heat-treatment furnace is first warming up to 400-850 DEG C after the iron nickle-base corrosion-resisting of flow harden state is closed again
Polishes well casing is placed in furnace and stablizes furnace temperature at 400-850 DEG C；
The present invention can significantly improve flow harden sections abros oil well pipe in H2Resistance to stress in S media environment is rotten
Cracking performance is lost, it is at low cost.
Detailed description of the invention
The relative resistivities of 028 alloy P110 rank oil well pipe of Fig. 1 different conditions；
The relative density of 028 alloy P110 rank oil well pipe of Fig. 2 different conditions；
The relative resistivities of 028 alloy Q125 rank oil well pipe of Fig. 3 different conditions；
The relative density of 028 alloy Q125 rank oil well pipe of Fig. 4 different conditions.
Specific embodiment
The heat treatment method for iron abros oil well pipe of the application is described in detail below with reference to embodiment
The specific embodiment of specific embodiment, the heat treatment method for iron abros oil well pipe of the application is not limited to
In following embodiments.
Embodiment 1
028 alloy composition of iron nickle-base corrosion-resisting (mass percent) is as follows:
C 0.012%；
Si 0.23%；
Mn 0.74%；
P 0.018%；
S 0.001%；
Cr 27.2%；
Ni 31.3%；
Mo 3.7%；
Cu 1.1%；
Surplus is Fe and other inevitable impurity.
7 in ISO 13680-2010 standard are corresponded to outer diameter 177.80mm, the wall thickness 8.05mm(of the preparation of above-mentioned alloy "
23.00 ppf specifications) flow harden state P110 rank oil well pipe be heat-treated as follows:
(1) cell-type Equipment for Heating Processing is used；
(2) resistance heating is used；
(3) using with stove heating mode；
(4) setting annealing temperature is 450 DEG C, and 028 alloy P110 rank oil well pipe of flow harden state iron nickle-base corrosion-resisting is added with furnace
5min/mm heat preservation is carried out after heat to set temperature；
(5) it is cooled down using the slow cooling mode of furnace cooling.
After 028 alloy P110 rank oil well pipe of the iron nickle-base corrosion-resisting sampling after above-mentioned flow harden state and heat treatment, point
Its resistivity and density are not examined.Flow harden state resistivity is 3.87 × 10-6Ω m, resistivity is 2.45 after heat treatment
×10-6Ω m, after heat treatment the resistivity of alloy is reduced to the 63.2% of flow harden state；The flow harden density of states is 8.02
×106g/m3, density is 8.05 × 10 after heat treatment6g/m3, after heat treatment the density of alloy is improved to flow harden state
100.4%.As a result as depicted in figs. 1 and 2 respectively.
To the 028 alloy P110 rank oil well pipe of iron nickle-base corrosion-resisting and control material after above-mentioned flow harden state and heat treatment
After the sampling of flow harden state nickle-base corrosion-resisting G-3 alloy P110 rank oil well pipe, mechanics is examined according to ISO 13680-2010 respectively
Performance, and four-point bending test method combination NACE is used according to NACE TM0177-2005 and ISO 7539-2:1989 standard
MR0175/ISO 15156-3:2009 standard requirements evaluate 175 °C of stress corrosion dehiscence resistant (SCC) performances, as a result such as
Shown in table 1.
1 different conditions of table, 028 alloy P110 rank oil well pipe and flow harden state G-3 alloy P110 rank oil well pipe
Mechanics and stress-corrosion-cracking resistance
As can be seen from Table 1, relative to flow harden state, the yield strength of 028 alloy oil well pipe of iron nickle-base corrosion-resisting after heat treatment,
Tensile strength and hardness slightly reduce, and elongation percentage and impact property have certain amplitude raising, but still are all satisfied P110 rank
Index request；In 175 °C of stress-corrosion-cracking resistance tests of four-point bending method, 1.38MPa H2S and 3.50MPa H2Two kinds of S
Under ambient condition, 028 alloy oil well pipe of iron nickle-base corrosion-resisting can be by test after flow harden state and heat treatment, and no cracking is existing
As；
In 4.14MPa H2028 alloy P110 rank oil well pipe of flow harden state iron nickle-base corrosion-resisting fails to pass through under S ambient condition
It tests and is cracked, 028 alloy P110 rank oil well pipe of iron nickle-base corrosion-resisting then passes through after the method for the present invention is heat-treated
Test and do not crack.
The mechanical property and two states iron of control material flow harden state nickle-base corrosion-resisting G-3 alloy P110 rank oil well pipe
028 alloy P110 rank oil well pipe of nickle-base corrosion-resisting is similar, and with 028 alloy P110 rank oil well pipe of iron nickle-base corrosion-resisting after heat treatment
3 kinds of various concentration H are equally all passed through2175 °C of stress-corrosion-cracking resistance tests of four-point bending method of S ambient condition,
Illustrate certain specific H in the case where P110 rank requires2In S ambient condition, if 028 alloy of flow harden state iron nickle-base corrosion-resisting cannot
Stress-corrosion-cracking resistance can be passed through by testing flow harden state nickle-base corrosion-resisting G-3 alloy by stress-corrosion-cracking resistance
Test, then can by by 028 alloy of flow harden state iron nickle-base corrosion-resisting carry out this application involves heat treatment be allowed to meet it is anti-
Stress corrosion cracking performance requirement.In other words, can by this application involves heat treatment method make low cost it is Eco-power
Iron nickel base alloy P110 rank oil well pipe has rotten with the analogous resistance to stress of more expensive nickel-base alloy P110 rank oil well pipe
Cracking performance is lost, this can substantially reduce cost of winning by using the Eco-power equipment material of low cost, keep peracidity oily
The scale of gas resource is developed into possibility.
Embodiment 2
028 alloy composition of iron nickle-base corrosion-resisting (mass percent) is as follows:
C 0.015%；
Si 0.19%；
Mn 0.72%；
P 0.020%；
S 0.002%；
Cr 26.7%；
Ni 31.5%；
Mo 3.8%；
Cu 1.2%；
Surplus is Fe and other inevitable impurity.
7 in ISO 13680-2010 standard are corresponded to outer diameter 177.80mm, the wall thickness 9.19mm(of the preparation of above-mentioned alloy "
26.00 ppf specifications) flow harden state Q125 rank oil well pipe be heat-treated as follows:
(1) Continuous Roller bottom furnace apparatus is used；
(2) using natural gas as combustion gas；
(3) warm heating method is used；
(4) 780 DEG C of annealing temperature are set, first Continuous Roller bottom furnace is warming up to flow harden state after set temperature again
028 alloy Q125 rank oil well pipe of iron nickle-base corrosion-resisting enters furnace and adjusts roller speed to carry out after set temperature to furnace temperature is stable
2.0min/mm heat preservation；
(5) it is cooled down using asbestos by the slow cooling mode of backpack cover after coming out of the stove.
After 028 alloy Q125 rank oil well pipe of the iron nickle-base corrosion-resisting sampling after above-mentioned flow harden state and heat treatment, point
Its resistivity and density are not examined.Flow harden state resistivity is 6.22 × 10-6Ω m, after heat treatment resistivity be 1.53 ×
10-6Ω m, after heat treatment the resistivity of alloy is reduced to the 24.6% of flow harden state；The flow harden density of states be 8.01 ×
106g/m3, density is 8.05 × 10 after heat treatment6g/m3, after heat treatment the density of alloy is improved to flow harden state
100.5%.As a result as shown in Figure 3 and Figure 4 respectively.
To the 028 alloy Q125 rank oil well pipe of iron nickle-base corrosion-resisting and control material after above-mentioned flow harden state and heat treatment
After the sampling of flow harden state nickle-base corrosion-resisting G-3 alloy Q125 rank oil well pipe, mechanics is examined according to ISO 13680-2010 respectively
Performance, and four-point bending test method combination NACE is used according to NACE TM0177-2005 and ISO 7539-2:1989 standard
MR0175/ISO 15156-3:2009 standard requirements evaluate 175 °C of stress corrosion dehiscence resistant (SCC) performances, as a result such as
Shown in table 2.
2 different conditions of table, 028 alloy Q125 rank oil well pipe and flow harden state G-3 alloy Q125 rank oil well pipe
Mechanics and stress-corrosion-cracking resistance
As can be seen from Table 2, relative to flow harden state, the yield strength of 028 alloy oil well pipe of iron nickle-base corrosion-resisting after heat treatment,
Tensile strength and hardness slightly reduce, and elongation percentage and impact property have certain amplitude raising, but still are all satisfied Q125 rank
Index request；In 175 °C of stress-corrosion-cracking resistance tests of four-point bending method, 1.38MPa H2Under S ambient condition, cold-working is hard
028 alloy oil well pipe of iron nickle-base corrosion-resisting can be by testing after change state and heat treatment, no cracking phenomena, but in 3.50MPa H2S
With 4.14MPa H2028 alloy Q125 rank oil well pipe of flow harden state iron nickle-base corrosion-resisting fails to pass through under the conditions of S two media
It tests and is cracked, 028 alloy Q125 rank oil well pipe of iron nickle-base corrosion-resisting is not cracked by test then after heat treatment.
The mechanical property and two states iron nickle-base corrosion-resisting of control material flow harden state nickle-base corrosion-resisting G-3 alloy Q125 rank oil well pipe
028 alloy Q125 rank oil well pipe is similar, and whole as 028 alloy Q125 rank oil well pipe of iron nickle-base corrosion-resisting after heat treatment
3 kinds of various concentration H are passed through2175 °C of stress-corrosion-cracking resistance tests of four-point bending method of S ambient condition, illustrate
Certain specific H under Q125 rank requires2In S ambient condition, if 028 alloy of flow harden state iron nickle-base corrosion-resisting cannot be by anti-
Stress corrosion cracking performance test and flow harden state nickle-base corrosion-resisting G-3 alloy can be tested by stress-corrosion-cracking resistance,
Then can by by 028 alloy of flow harden state iron nickle-base corrosion-resisting carry out this application involves heat treatment be allowed to meet resistance to stress corruption
Lose cracking performance requirement.In other words, can by this application involves heat treatment method keep the Eco-power iron of low cost Ni-based
Alloy Q125 rank oil well pipe has and the more expensive analogous stress corrosion dehiscence resistant of nickel-base alloy Q125 rank oil well pipe
Performance, this can substantially reduce cost of winning by using the Eco-power equipment material of low cost, make peracidity petroleum resources
Scale be developed into possibility.
The present invention can be used for containing H2The inexpensive flow harden sections abros oil well pipe of S oil gas engineering and its
The production of mating box cupling, can satisfy containing H2The production development technical need of S oil gas engineering, can replace under particular medium environment
For more expensive nickel-base alloy oil well pipe, to reduce the cost of winning of peracidity petroleum resources.The application's is hard for cold-working
The heat treatment method for changing sections abros oil well pipe has good city to by the energy industry of representative of petrochemical industry
Field promotion prospect.
From the foregoing it is appreciated that although in order to which the purpose of exemplary illustration describes the specific embodiment of the application,
But under conditions of without departing from spirit and scope, technical staff described in this field can make various modifications or change
Into these deformations or improvement should all be fallen into the application scope of the appended claims.
Claims (4)
1. being used for the heat treatment method of flow harden sections abros oil well pipe, it is characterised in that including following the description:
(1) Equipment for Heating Processing uses cell-type heat-treatment furnace or Continuous Roller bottom furnace；
(2) heat medium uses resistance heating or natural gas；
(3) heating method is used with stove heating or is heated to temperature；
(4) heating temperature is 400-850 DEG C, and soaking time is 1.5-6.0min/mm heat preservation；
(5) slow cooling is to room temperature；
Described with stove heating is the iron abros oil well pipe by flow harden state with stove heating to set temperature；It is described to arrive
Temperature heating be that heat-treatment furnace is first warming up to set temperature, after the iron abros oil well pipe of flow harden state is placed on
Stablize in furnace and after furnace temperature and carries out 1.5-6.0min/mm heat preservation after set temperature；Set temperature is 400-850 DEG C.
2. the heat treatment method according to claim 1 for flow harden sections abros oil well pipe, special
Sign is that the slow cooling mode is furnace cooling, asbestos by backpack cover or husky lid.
3. the heat treatment method according to claim 1 or 2 for flow harden sections abros oil well pipe,
Equipment for Heating Processing is characterized in that using cell-type heat-treatment furnace, heat medium uses resistance, and heating temperature is 450 DEG C, soaking time
The resistivity for being the iron abros oil well pipe of 5min/mm isothermal holding is 2.45 × 10-6Ω m, density be 8.05 ×
106g/m3；The chemical component mass percent of the iron abros is:
C is 0.012%；
Si is 0.23%；
Mn is 0.74%；
P is 0.018%；
S is 0.001%；
Cr is 27.2%；
Ni is 31.3%；
Mo is 3.7%；
Cu is 1.1%；
Surplus is Fe and other inevitable impurity.
4. the heat treatment method according to claim 1 or 2 for flow harden sections abros oil well pipe,
Equipment for Heating Processing is characterized in that using Continuous Roller bottom furnace, heat medium uses natural gas, and heating temperature is 780 DEG C, when heat preservation
Between be 2min/mm isothermal holding iron abros oil well pipe resistivity be 1.53 × 10-6Ω m, density be 8.05 ×
106g/m3；The chemical component mass percent of the iron abros is:
C is 0.015%；
Si is 0.19%；
Mn is 0.72%；
P is 0.020%；
S is 0.002%；
Cr is 26.7%；
Ni is 31.5%；
Mo is 3.8%；
Cu is 1.2%；
Surplus is Fe and other inevitable impurity.
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|---|---|---|---|
| CN201811422214.2A CN109576477A (en) | 2018-11-27 | 2018-11-27 | Heat treatment method for flow harden sections abros oil well pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811422214.2A CN109576477A (en) | 2018-11-27 | 2018-11-27 | Heat treatment method for flow harden sections abros oil well pipe |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008223146A (en) * | 2008-05-13 | 2008-09-25 | Hitachi Metals Ltd | METHOD FOR PRODUCING Fe-Ni BASED ALLOY THIN SHEET |
| CN102369300A (en) * | 2009-04-01 | 2012-03-07 | 住友金属工业株式会社 | Method for producing high-strength cr-ni alloy seamless pipe |
| CN103266282A (en) * | 2013-05-28 | 2013-08-28 | 宝山钢铁股份有限公司 | L415MB steel grade high frequency longitudinal welded pipe and manufacturing method thereof |
| CN106555095A (en) * | 2016-11-18 | 2017-04-05 | 山西太钢不锈钢股份有限公司 | For containing H2The corrosion resistant alloy of S oil gas engineerings, the oil well pipe containing the alloy and its manufacture method |
-
2018
- 2018-11-27 CN CN201811422214.2A patent/CN109576477A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008223146A (en) * | 2008-05-13 | 2008-09-25 | Hitachi Metals Ltd | METHOD FOR PRODUCING Fe-Ni BASED ALLOY THIN SHEET |
| CN102369300A (en) * | 2009-04-01 | 2012-03-07 | 住友金属工业株式会社 | Method for producing high-strength cr-ni alloy seamless pipe |
| CN103266282A (en) * | 2013-05-28 | 2013-08-28 | 宝山钢铁股份有限公司 | L415MB steel grade high frequency longitudinal welded pipe and manufacturing method thereof |
| CN106555095A (en) * | 2016-11-18 | 2017-04-05 | 山西太钢不锈钢股份有限公司 | For containing H2The corrosion resistant alloy of S oil gas engineerings, the oil well pipe containing the alloy and its manufacture method |
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